G. Special verbs taking a phrase of duration. There is a class of verbs describing actions that terminate as soon as they begin, such as: bìyè毕业graduate, jiéhūn结婚get married, rènshi认识meet (in the sense of becoming acquainted for the first time), tuìxiū退休retire and so on. They are one-shot actions that do not last. For example, one is either married or not married, retired or not retired. So, to indicate the duration of the state as a result of the action, the sentence must use the sentence-end modal particle le了. Zài在 ‘to be at (a place)’ does not belong to this category. It can be compared to a verb of denoting posture. It also uses the sentence-end le了 when its duration is attached to it.
7.1 Tāmén jiéhūn liǎng nián le.
They have been married for two years. /It’s been two years since they got married.
7.2 Wǒ bìyè shí nián le.
It’s been ten years since I graduated.
7.3 Wǒmén rènshi liǎng gè yuè le.
We have known each other for two months. /It has been two months since we met.
7.4 Lǐ xiānsheng zai Měiguó liǎng gè yuè le.
Mr. Li has been in
It is important to note that sǐ死‘die’ belongs to this type of verbs. When it takes a phrase of duration it does not indicate that the action itself is lasting for that duration. What it indicates is the duration of the state as a result of the action, namely, the duration of being dead. Unlike other verbs in this category, sǐ must take a verb-suffix le了 as well as a sentence-end modal particle le了. Sì-le死了 here indicates the state of being dead.
7.5 Tā sǐ-le yì nián le.
It’s been a year since he died. /He’s been dead for a year.
These special verbs must follow these rules, which are quite different from those that regular verbs have to follow. Please read on to see notes below about how regular verbs use le了 to indicate actions progressing up to when they are brought up in the conversation.